I have a 125 gallon saltwater tank and last night I had 3 fish die randomly. Two clownfish and a kole tang. They showed no signs of anything on their bodies and we're eating yesterday. I did notice a few spots of ich on my foxface about a week ago but they went away and the entire tank has been eating well and showing no signs of stress. I checked for stray voltage in the tank and didn't find any with my pumps and heater on. I tested my parameters yesterday and they were as follows:
Ammonia: 0
Nitrite: 0
Nitrate: 5 ppm
Temp: 78.7⁰ F
Salinity: 1.026
Phosphate: 0.1
Magnesium:. 1350
Calcium: 410 ppm
Alkalinity: 9.5 dKh
pH: 8.3
Any idea what could have killed them? I added a Nero 5 pump over the weekend to upgrade my cheap Amazon pumps but I don't see why that would change anything. I also have a small hippo tang, foxface, firefish, and a melanarus wrasse that all seem mostly normal outside of the foxface, who looks to have a a slight white film on his belly (photo included)
Also did a 25% water change over this past weekend
Ammonia: 0
Nitrite: 0
Nitrate: 5 ppm
Temp: 78.7⁰ F
Salinity: 1.026
Phosphate: 0.1
Magnesium:. 1350
Calcium: 410 ppm
Alkalinity: 9.5 dKh
pH: 8.3
Any idea what could have killed them? I added a Nero 5 pump over the weekend to upgrade my cheap Amazon pumps but I don't see why that would change anything. I also have a small hippo tang, foxface, firefish, and a melanarus wrasse that all seem mostly normal outside of the foxface, who looks to have a a slight white film on his belly (photo included)
Also did a 25% water change over this past weekend